I found this to be a very interesting game that I quite enjoyed, and I can really see how the core mechanics demonstrated here can be used to create more complex and challenging puzzles and levels.
I also really liked the visuals of the game, especially the grainy type of filter that was applied to the game. This grain filter made the game feel as though it was nighttime in the game, yet without the game being too dark to see what was going on.
I feel that perhaps the game could use some more audio whilst playing the levels, perhaps even the audio used on the how to play screen could be used for the levels as well.
Perhaps a tutorial level may be more effective than a How To Play screen for players that don't like having to read a lot.
Brendan (Team Lactose Intolerance)